to flash roms on 4.4.X you have to have a newer version of TWRP. You are on the old version. Restore from back up if you have wiped and update TWRP before flashing. It should be 2.6.3.2 the version you have has a different kernel and it will not work

to flash roms on 4.4.X you have to have a newer version of TWRP. You are on the old version. Restore from back up if you have wiped and update TWRP before flashing. It should be 2.6.3.2 the version you have has a different kernel and it will not work

It still cannot restore back! Everytime i restore back just back to the TWRP page, somone said go to the download mode, but just it can't..

And i met the issue with my LG V500. And I use the download mode to install the original official rom. I am not sure it works on V510, But myabe you can try it.
1. Download the LG MOBILE SUPPORT TOOL by this link:http://www.lg.com/us/support-mobile/lg-V500-White
2. install the software in computer, Plug in USB cable with computer, Open the software LG MOBILE SUPPORT TOOL.
3. Turn off Pad and unplug.
4. press hold both volume up and volume down, Then plug in usb cable, And then pad is in downlaod mode
5. USB driver will be insatlled automatically
6. In LG MOBILE SUPPORT TOOL, click option---.country and language-OK, then click option--upgrade recovery
7. It will installe original official rom automatically.
8. After about 1.5 hours, The pad will be installed the last official room.

Yeah I understand but a high % of people on here don't read everything before trying something. If you don't remind him that it just for reference but may differ he may try it. It would probably fail because of the locked boot loader but still just have to be careful.

One guy hard bricked his V500 by flashing V510 stuff over it. Now he had to trick it to receive OTAs but it is possible.
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